Study: 48% of ad traffic on “fake” news publishers and 32% of ad traffic on “low credibility sites” like Breitbart is served by Google
Ryan Barwick / Morning Brew :
Context & Ripple Effects
Ryan Barwick's Morning Brew study lands a decade after Bloomberg documented bot-driven click fraud costing advertisers $6.3B, but shifts the question from fake clicks to real money: even legitimate ad spend routed through Google ends up funding fake news publishers (48% of their ad traffic) and low-credibility outlets like Breitbart (32%).
The finding also foreshadows what came later in this coverage arc — ProPublica's report that Google's Display Network lets anonymous site owners monetize pirated content and disinformation, and NewsGuard's analysis that 141 major brands ran ads across 55 AI-generated article farms largely through Google Ads — making this study an early data point in a recurring pattern rather than a one-off scandal.
First-order effects
- Major advertisers learn their programmatic budgets are directly financing fake news and low-credibility publishers, with no way to see where Display Network placements actually land.
- Google faces immediate reputational exposure: its own network is the dominant delivery mechanism for ads on sites its policies nominally exclude.
Second-order effects
- Advertisers and agencies push for placement transparency and verification tools, pressuring Google to tighten Display Network controls — pressure that resurfaces years later when NewsGuard catches the same brands on AI content farms and Google's own safety report shows record blocks alongside fewer advertiser suspensions (8.3B ads blocked in 2025).
- Low-credibility publishers gain a durable revenue floor from mainstream brand dollars, which strengthens the incentive to scale questionable content — the same dynamic NewsGuard later documents at ~1,200 AI articles per day per site.
Third-order effects
- If the pattern holds, programmatic advertising structurally subsidizes misinformation at scale regardless of individual brand intent, because automated placement rewards volume over provenance — pushing regulators and major buyers toward demanding auditable placement chains.
- The economics cut both ways with AI search: as AI Overviews erode publisher referral traffic, legitimate outlets lose ad revenue while low-quality sites still capture programmatic spend, widening the quality gap in news economics.
The trend: Programmatic advertising keeps channeling brand dollars into fake, low-credibility, and AI-generated publishers because automated placement scales faster than enforcement, leaving the ad-safety gap open a decade after the fraud era began.